linux-ext4 - [PATCH] ext2: guard reservation window dump with EXT2FS

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Message-ID: <20260207022920.258247-1-nikic.milos@gmail.com>
Date: Fri,  6 Feb 2026 18:29:20 -0800
From: Milos Nikic <nikic.milos@...il.com>
To: jack@...e.com
Cc: linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Milos Nikic <nikic.milos@...il.com>
Subject: [PATCH] ext2: guard reservation window dump with EXT2FS_DEBUG

The function __rsv_window_dump() is a heavyweight debug tool that walks
the reservation red-black tree. It is currently guarded by #if 1,
forcing it to be compiled into all kernels, even production ones.

Match the rest of the file by guarding it with #ifdef EXT2FS_DEBUG,
so it is only included when explicit debugging is enabled.

This removes the unused function code from standard builds.

Signed-off-by: Milos Nikic <nikic.milos@...il.com>
---
 fs/ext2/balloc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index b8cfab8f98b9..0fee01ed56d0 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -201,7 +201,7 @@ static void group_adjust_blocks(struct super_block *sb, int group_no,
  * windows(start, end). Otherwise, it will only print out the "bad" windows,
  * those windows that overlap with their immediate neighbors.
  */
-#if 1
+#ifdef EXT2FS_DEBUG
 static void __rsv_window_dump(struct rb_root *root, int verbose,
 			      const char *fn)
 {
@@ -248,7 +248,7 @@ static void __rsv_window_dump(struct rb_root *root, int verbose,
 	__rsv_window_dump((root), (verbose), __func__)
 #else
 #define rsv_window_dump(root, verbose) do {} while (0)
-#endif
+#endif /* EXT2FS_DEBUG */
 
 /**
  * goal_in_my_reservation()
-- 
2.52.0